Add and subtract times

Add and subtract times

Times are added the same way. Press on C. For 3 hours, 30 minutes, 45 seconds, press 3, degrees key, 30, degrees key and 45. Press plus. For 6 hours, 45 minutes, 36 seconds, press 6, degrees key, 45, degrees key and 36. Press equals: 10°16'21.". To calculate 3 hours 45 minutes minus 1.69 hours, press 3, degrees key, 45, minus, 1.69 and equals. Then press second F and the degrees key to show the answer as a time: 2°3'36.".